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19 April 2024

» arxiv » cond-mat/0212163

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Exact solutions and elementary excitations in the XXZ spin chain with unparallel boundary fields
Junpeng Cao ; Hai-Qing Lin ; Kang-jie Shi ; Yupeng Wang ;
Date:	8 Dec 2002
Subject:	Strongly Correlated Electrons \| cond-mat.str-el
Abstract:	By using a set of gauge transformations, the exact solutions of the XXZ spin chain with unparallel boundary magnetic fields are derived in the framework of the algebraic Bethe ansatz. In the easy-plane case, we show the elementary excitations are some kind of spinons without definite spin because the U(1) symmetry is broken, while in the easy-axis ferromagnetic case a spiral state is realized in the ground state. The correlation functions, the spin torque as well as the spin voltage for the later case are also derived.
Source:	arXiv, cond-mat/0212163
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